Lasers effects on enamel for caries prevention

Ana, Patrícia Aparecida; Bachmann, Luciano; Zezéll, Denise Maria

doi:10.1134/s1054660x06050197

Cited by 98 publications

(115 citation statements)

References 64 publications

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“…Laser irradiation of incipient dental caries or partially demineralized enamel might arrest the development of caries. 3 Therefore, the treatment of white spot lesions with laser radiation for increasing the resistance to demineralization, in association with other measures such as control of diet and dental biofilms, could arrest the progression of incipient caries. Further studies with qualitative and quantitative evaluations of the inorganic substrates in incipient dental caries and such evaluations after laser irradiation, as done in this study, are required to ascertain whether such a treatment would have clinical applicability in controlling the advance of disease when caries formation has already begun.…”

Section: Discussionmentioning

confidence: 99%

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Dental Enamel Irradiated with Infrared Diode Laser and Photo-Absorbing Cream: Part 2—EDX Study

Sant'Anna

Santos

Soares

et al. 2009

Photomedicine and Laser Surgery

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Objective: The effects of laser-induced compositional changes on the enamel were investigated by energydispersive X-ray fluorescence spectrometry (m-EDX). After cariogenic challenge, we administered treatment of low-level infrared diode laser and a photo-absorbing cream (used to intensify the superficial light absorption). Background Data: Dental caries is considered the most prevalent oral disease. A simple and noninvasive caries preventive regimen is treating tooth enamel with a laser, either alone or in combination with fluoride, which reduces enamel solubility and dissolution rates. High power lasers are still not widely used in private practice. Low-power near-infrared lasers may be an alternative approach. Energy-dispersive m-EDX is a versatile and nondestructive spectroscopic technique that allows for a qualitative and quantitative elemental analysis of inorganic enamel components, such as calcium and phosphorus. Materials and Methods: Twenty-four extracted or exfoliated caries-free deciduous molars were divided into six groups: 1) control group (CTR-no treatment); 2) infrared laser treatment (L) (l ¼ 810 nm, 100 mW=cm 2 , 90 sec, 4.47 J=cm 2 , 9 J); 3) infrared laser irradiation and photo-absorbing agent (CL); 4) photo-absorbing agent alone (C); 5) infrared laser irradiation and fluoridated photo-absorbing agent (FCL); and 6) fluoridated photo-absorbing agent alone (FC). Samples were analyzed using m-EDX after two sets of treatments and pH cycling cariogenic challenges. Results: The CL group showed statistically significant increases in calcium and phosphorus (wt%) compared with the CTR group. The Ca=P ratio was similar in the FCL and CTR groups. There was a significant laser-induced reduction compared with the CTR group, and there was a possible modification of the organic balance content in enamel treated with laser and cream. Conclusion: m-EDX may be able to detect compositional changes in mineral phases of lased enamel under cariogenic challenge. Our results suggest that with a combined laser and photo-absorbing agent (CL) treatment, there was a possible disorganization of organic content in the tooth enamel with hydroxyapatite crystal reordering and reorganization.

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Section: Discussionmentioning

confidence: 99%

“…[1][2][3][4] The disease has become polarized, with caries occurring mostly in certain groups of children who present with high caries activity. 5,6 This transmittable bacterial disease affects more children than any other disorder and is particularly prevalent in children from families with low socioeconomic status [7][8][9] and in immunocompromised children.…”

mentioning

confidence: 99%

Dental Enamel Irradiated with Infrared Diode Laser and Photo-Absorbing Cream: Part 2—EDX Study

Sant'Anna

Santos

Soares

et al. 2009

Photomedicine and Laser Surgery

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“…Praca laserów o dużej mocy w tkankach jest nierozerwalnie związana z podwyższeniem temperatury, co z kolei powoduje wiele zmian w ich strukturze, takich jak denaturacja białek, odparowanie wody, koagulacja, a nawet topnienie [19,20]. Pierwsze zmiany w strukturze tkanki miękkiej jamy ustnej zaczynają się w czasie podniesienia jej temperatury do 42°C (ΔT = 5°C).…”

Section: Omówienieunclassified

Assessment of an Impact of a Diode Laser Mode with Wavelength of 980 nm on a Temperature Rise Measured by Means of k-02 Thermocouple: Preliminary Results

Matys¹,

Grzech‐Leśniak²,

Flieger³

et al. 2016

Dent. Med. Probl.

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A -koncepcja i projekt badania, B -gromadzenie i/lub zestawianie danych, C -analiza i interpretacja danych, D -napisanie artykułu, E -krytyczne zrecenzowanie artykułu, F -zatwierdzenie ostatecznej wersji artykułu StreszczenieWprowadzenie. Lasery diodowe są wykorzystywane w chirurgii tkanek miękkich. Nowoczesne lasery diodowe umożliwiają ustawienie mocy wynoszącej 0-10 W wraz z modyfikacją długości impulsów (Ton) i przerwy między nimi (Toff). Cel pracy. Rozstrzygnięcie, czy istnieje różnica we wzroście temperatury podczas działania lasera diodowego w trybie ciągłym (CW) i pulsacyjnym (PW) z różnymi ustawieniami Ton i Toff oraz mocy lasera. Oceniano ponadto gradient temperatury w trybie CW i PW dla tej samej dawki energii wysłanej przez laser diodowy. Materiał i metody. Sondę temperatury typu k oraz rękojeść lasera diodowego umieszczono nieruchomo w imadle. Wykonano naświetlania sondy za pomocą lasera diodowego 980 nm pracującego w trybie ciągłym (CW) i pulsacyjnym (PW) z różnymi ustawieniami długości impulsu (Ton) i czasu przerwy (Toff). Parametry lasera były nastę-pujące: włókno -200 µm, odległość włókna od sondy -1 mm, tryb CW (moc w W) -0,5; 1; 1,5; 2; 2,5; 3; 3,5; 4, tryb PW (W) -0,5; 1; 1,5; 2; 2,5; 3; 3,5; 4; 4,5; 5; 5,5; 6, Ton/Toff -100/100, 200/200, 300/300, 400/400, 500/500. Pomiar temperatury wykonano po 10, 20, 30 i 60 s naświetlania za pomocą skalibrowanego cyfrowego termometru. Wyniki. Zaobserwowano istotny wzrost temperatury wraz ze zwiększaniem mocy w trybie CW i PW. Przyrost temperatury w trybie CW był większy niż w PW w zakresie mocy 0,5-4 W. Nie zaobserwowano istotnej różnicy w wynikach wzrostu temperatury w zależności od stosunku Ton/Toff. Nie stwierdzono także znaczących różnic dla lasera diodowego pracującego w trybie CW i PW po 60 s dla jednakowych wartości wysłanej energii (30, 60, 90, 120, 160, 180 J). Wnioski. Wzrost temperatury dla tej samej mocy lasera jest większy w trybie pracy ciągłej. Wysłanie jednakowej energii w identycznym czasie przez laser diodowy powoduje jednak zwiększenie temperatury podczas pracy w trybie pulsacyjnym (Dent. Med. Probl. 2016, 53, 3, 345-351).Słowa kluczowe: temperatura, laser diodowy, fala ciągła, fala pulsacyjna, sonda temperatury. AbstractBackground. Diode lasers are utilized successfully in a soft tissue surgery. Modern diode lasers allow to set power in the range of 0-10 W with modification of a pulse and interval duration (Ton and Toff). Objectives. The aim of this study was to establish if there is a difference in temperature rise during operation of

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“…Depending on laser wavelength and tissue characteristics, laser irradiation can be absorbed, scattered, reflected or transmitted into dental tissues (Ana et al, 2006;Featherstone, 2000;Niemz, 2004;Seka et al, 1996). These effects must be well known by professionals to help them choose the best equipment for a specific clinical application and to avoid thermal and mechanical damages to the target and surrounding tissues.…”

Section: Laser Interaction With Dental Hard Tissuesmentioning

confidence: 99%

“…This mechanism relies on the type of tissue to be irradiated, as well as the characteristics of laser equipments. The knowledge of laser wavelength, laser emission, pulse duration, pulse energy, repetition rate, beam spot size, delivery method, laser beam characteristics (Ana et al, 2006), and optical properties of the tissue, such as the refractive index, the scattering coefficient (μ s ), the absorption coefficient (μ a ), and the scattering anisotropy (Featherstone, 2000a) are necessary to assure better clinical results without thermal or mechanical damages to the dental hard tissue.…”

Section: Introductionmentioning

confidence: 99%